Compression pump



June 21 1927.

. o. A. OLSEN COMPRESSION PUMP Filed Aug. 28, 1925 INVENTOR afiwaidfl alser'l/ BY (5 gnu? ZTTORNEY Patented June 21, 1927.

UNITED STATES 1,633,270 PATENT orrica.

OSWALD A. OLSEN, 0F BRIDGEPORT, CONNECTICUT.

COMPRESSION PUMP.

Application filed August 28, 1925. Serial No. 53,080.

This invention relates to a compression pump for pumping fluids, and an object of the invention is to provide a double acting compression pump wherein there is a ported piston providing the valve means rendering the structure operative.

A further object is to provide in'the pump, 1 ported pump piston adapted to alternately afford communication between each end of the pump cylinder and aninduction and an eduction port.

A further object is to providein the pump, a ported pump piston adapted to have movements of reciprocation and oscillation in the pump cylinder, and means for imparting said movements to said piston, the whole arranged to afford communication at each-limit of the pumping stroke between an end of the pump cylinder and an inductionport and the opposite end-of the pump cylinder and aneduction port, whereby upon each full stroke of said piston, a charge of fluid is removed from an end of the pump cylinder and forced into an eduction port, while a charge is drawn from an. induction port-to the 0pposite end of said cylinder. I

VVith the aboveobjects in view, as well as others which will appear as the specification proceeds, the invention comprises the construction, arrangement and combination of parts as now-t0 be fully describedand as hereinafter to be specifically claimed, it being understood that the disclosure herein is merely illustrative and means in no way in a limiting sense, changes in details of construction and arrangement of parts being permissible so long as within the spiritof the invention and the scope of the appended claims.

In the accompanying drawing forming a part of this specification,

Fig. 1 is a longitudinal sectional view of the improved compression pump, disclosing the left end of the c linder exhausted and the right end thereof 'lled;

Fig. 2 is a sectional view on line 2--2 in Fig. 1; v

Fig. 3 is a sectional view on line 3 in Fig. 1; and

F ig. d: is an enlarged detail of modification.

With respect to the drawing and the numerals of reference indicated thereon, 10 indicates a compression cylinder having heads 11, 11', and containing a piston 12 adapted to reciprocate and oscillate therein.

a slight port 22 of said cylinder.

. The mechanism for imparting both ofits movements to the piston is best shown in Figs. 2 and 3, and consists of a wrist pin 13 fixed to the piston preferably at its midlength and'projecting radially through an opening 1 1 in the side of the cylinder. This opening is covered by a casing 15 secured to the cyl the crank plate 19 to rotate, and, through the instrumentality of the wrist pin, the pistion is given movements of reciprocation and oscillation in the compression cylinder 10.

. Thecompression cylinder has an induction port 21, and an eduction port 22. The piston 1.2 has, at its left hand end, an induction port communicatingwith the left hand end of the pump cylinder and adapted to communicate With the induction port 21 of the cylinder, and has, at its right hand end, an eduction port 24 communicating with the right hand end of the pump cylinder and adapted to communicate with the eduction 7 Also, the piston has, at its right hand end, an induction port 25 communicating with the right hand end of the pump cylinder and adapted tocommunicate with the induction port 21 of said cylinder, and has, at its left hand end, an eduction port 26 communicating with the left hand end of the pump cylinder and adapted to communicate with the eduction port 22 of said cylinder.

As will be more clear from Figs. 1 and 2, the ports 23, 24, 25 and 26 terminate in grooves, denoted 27, 28, 29 and 30, respectively, in the surface of the pump piston, and these grooves bear to each other the relation very clearly disclosed in Fig. 2. That is to say, assuming that the parts of the compressor are as disclosed in Figs. 1 and 2, and the gear 18 is rotated, in the direction of the arrow in Fig. 2, full stroke toward the right, at the commencement of said stroke,the induction port 21- of the cylinder comes into communication with the induction port 23 of the piston, while the eduction port 220i said cylinder comes into communication with the educto give the piston a full stroke of the piston. I

the fluid at the left hand end of the compres the right hand end oi the compression cylinder is forced out through the port 22, via the port and the groove 28, while .fiuid is drawn into the left 'hand'end of the compression cylinder via the induction port 2i. the groove 27, and the induction port 23. Now, upon piston, the induction port 2i of the cylinder immediately comes into communication with the induction port 25 of the piston, while the eductic-n port 2:2 oi? said cylinder comes into communication with the eduction port 26 of said piston, and this rela ion of the ports as described remains throughout the As a consequence,

sion' cylinder is forced out through said eduction port via the port 26, the groove 30, while fluid is drawn into the right hand end of the compression cylinder via theinduction port 21. the groove and the port 25.

Clearly, for approximately the full stroke of the piston in eithGF- lHQCtlOD the fluid is both being forced from the compression cylinder through the eduction port, and drawn into said compression is to say, with the present arrangement,

the piston is working at full capacity during approximately its full stroke. j

that he pump couldbe It will be evident actuated in ways ditl crent from that shown.

For instance, the gear 18 could he a handle for manually operating the piston, or the shaft 18' could be attached directly to a motor,

The wrist pin may be associated with the piston 12 many suitable or convenient spring 31 wrist pin and engaging the piston as at 33 in the hall of said pin to the socket of the crank plate, as will he clear. In Fig, i I have shown a nut threaded into the crank plate and arranged about the hall of the wrist pin to better insure its position.

i-iavingthus "fully described the invention,

what I claim as newand desire to secure by LettersPatent is:

1. A compression eduction port, a piston in said cylinder, and means for reciprocating and oscillating the piston in said cylinder, the piston having an induction port communicating with one the reverse'inoreinent of saidthe eduction port pump comprising a cylinder having an induction port and an cylinderton ports and cylinder with, the opposite end of the cylinder and e ,at apted to. communicate with the induction port of the. cylinder, an eduction port coniinunioating with one'end oi the cylinder and adapted to communicate with the eduction port of :the cylinder, communicating with the opposite end-of the cylinder and adapted to communicatewith.

of the cylinder, the whole arranged so that during thewhole stroke of the pistonan induction port thereof is; in communication with one end of the cylinder as well as with the induction port of or the. cylinder while .an eduction port is in communication withthe opposite end of the "cylinder asw ell as with the eductionrport 1 of? the cylinden i cylinder through the induction port. That 2,wherein each induction and reduction,

portpt the piston terininatesjinagroove in the surtacelof'the piston, a grooye of an induction;pert of said piston afiording communifoation: between induction ports. of saidzpistonfand cylinder; and a groove of an eduction port ofsaid piston aliording communication between educti-on ports of said-piston and cylinder during approximately the whole of each stroke of said manner. In the drawing Ihavedisclosed a-' situated'in an opening 32 in the piston.

cylinderyhavin'g aninduction' port and an such manner as to provide yielding pressure upon the wrist pin tending to nicely hold eduction port, piston in the. cylinder, and means-torreciprocating and oscillating the piston'in said cylinder, the piston having an induction-port communicating with one end of the cylinder and adapted to communicate with theinduction port of the cy inder, an induction port communicating with the opposite end. of the cylinder and adapted to communicate with the induction port of the cylinder, an eduction port communicating with one end of the cylinder and adapted 'to communicate vwith the eduction port of the cylinder during the whole period while an induction port of the piston is in communication with the induction port or" the cylinder, and an eduction port communicating with the opposite end of the and adapted to communicate with the educt-ion port of the cylinder during the whole period while a different induction port of the piston is in communication with the induction port of the cylinder, said pisports'being arranged relativelyto each other so that during practically the entire stroke of the piston an inand an eductien port ill) duction port thereof is in communication with an end of the cylinder as wellas with the induction port of the cylinder While an eduction port is in Communication with the opposite end of the cylinder as well as with the eduction port of the cylinder.

5. The combination as specified in claim l, wherein each port of the piston terminates in a curved groove in the surface of the piston, a groove of an eduction port of said piston afi'ording communication be- I each of both the tween induction ports of said piston and cylinder and a groove of an eduction port of said piston aflording communication between eduction ports of said piston and cylinder during approximately the Whole of to and fro strokes of said piston.

Signed at Bridgeport, in the county of Fairfield, and State of Connecticut, this 1 26th day of August, A. D., 1925.

' OSWALD A. OLSEN. 

